
<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button @click="logout" type="info">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <!-- 折叠展开菜单按钮 -->
        <div class="toggle-button" @click="togglCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <!-- 激活文本的颜色  active-text-color-->
        <!-- unique-opened每次只展开一个 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 这是一级菜单 -->
          <!-- 每一个subMenu的index都是唯一的 ，string格式-->
          <el-submenu :index="item.id + ''" :key="item.id" v-for="item in menulist">
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObjs[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/'+subItem.path"
              :key="subItem.id"
              v-for="subItem in item.children"
              @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主体结构 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      isCollapse: false,
      // 左侧菜单数据
      menulist: [],
      activePath: '',
      iconObjs: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      }
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.menulist = res.data
      console.log(this.menulist)
    },
    // 点击按钮，切换菜单的折叠和展开
    togglCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存连接的激活状态
    saveNavState(activePath) {
      this.activePath = activePath
      window.sessionStorage.setItem('activePath', activePath)
    }
  }
}
</script>

<style lang='less' scope>
.home_container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    > span {
      margin-left: 15px;
    }
    > img {
      width: 50px;
      height: 50px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: 0;
  }
}
.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
